<!DOCTYPE HTML>
<html lang="{{ language }}" class="{{ default_theme }}" dir="{{ text_direction }}">

<head>
  <!-- Book generated using mdBook -->
  <meta charset="UTF-8">
  <title>{{ title }}</title>
  {{#if is_print }}
  <meta name="robots" content="noindex">
  {{/if}}
  {{#if base_url}}
  <base href="{{ base_url }}">
  {{/if}}


  <!-- Custom HTML head -->
  {{> head}}

  <meta name="description" content="{{ description }}">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="theme-color" content="#ffffff">

  {{#if favicon_svg}}
  <link rel="icon" href="{{ path_to_root }}favicon.svg">
  {{/if}}
  {{#if favicon_png}}
  <link rel="shortcut icon" href="{{ path_to_root }}favicon.png">
  {{/if}}
  <link rel="stylesheet" href="{{ path_to_root }}css/variables.css">
  <link rel="stylesheet" href="{{ path_to_root }}css/general.css">
  <link rel="stylesheet" href="{{ path_to_root }}css/chrome.css">
  {{#if print_enable}}
  <link rel="stylesheet" href="{{ path_to_root }}css/print.css" media="print">
  {{/if}}

  <!-- Fonts -->
  <link rel="stylesheet" href="{{ path_to_root }}FontAwesome/css/font-awesome.css">
  {{#if copy_fonts}}
  <link rel="stylesheet" href="{{ path_to_root }}fonts/fonts.css">
  {{/if}}

  <!-- Highlight.js Stylesheets -->
  <link rel="stylesheet" href="{{ path_to_root }}highlight.css">
  <link rel="stylesheet" href="{{ path_to_root }}tomorrow-night.css">
  <link rel="stylesheet" href="{{ path_to_root }}ayu-highlight.css">

  <!-- Custom theme stylesheets -->
  {{#each additional_css}}
  <link rel="stylesheet" href="{{ ../path_to_root }}{{ this }}">
  {{/each}}

  {{#if mathjax_support}}
  <!-- MathJax -->
  <script async src="https://lib.baomitu.com/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
  {{/if}}
</head>

<body class="sidebar-visible no-js">
  <div id="body-container">
    <!-- Provide site root to javascript -->
    <script>
      var path_to_root = "{{ path_to_root }}";
      var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "{{ preferred_dark_theme }}" : "{{ default_theme }}";
    </script>

    <!-- Work around some values being stored in localStorage wrapped in quotes -->
    <script>
      try {
        var theme = localStorage.getItem('mdbook-theme');
        var sidebar = localStorage.getItem('mdbook-sidebar');

        if (theme.startsWith('"') && theme.endsWith('"')) {
          localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
        }

        if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
          localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
        }
      } catch (e) { }
    </script>

    <!-- Set the theme before any content is loaded, prevents flash -->
    <script>
      var theme;
      try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { }
      if (theme === null || theme === undefined) { theme = default_theme; }
      var html = document.querySelector('html');
      html.classList.remove('{{ default_theme }}')
      html.classList.add(theme);
      var body = document.querySelector('body');
      body.classList.remove('no-js')
      body.classList.add('js');
    </script>

    <input type="checkbox" id="sidebar-toggle-anchor" class="hidden">

    <!-- Hide / unhide sidebar before it is displayed -->
    <script>
      var body = document.querySelector('body');
      var sidebar = null;
      var sidebar_toggle = document.getElementById("sidebar-toggle-anchor");
      if (document.body.clientWidth >= 1080) {
        try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch (e) { }
        sidebar = sidebar || 'visible';
      } else {
        sidebar = 'hidden';
      }
      sidebar_toggle.checked = sidebar === 'visible';
      body.classList.remove('sidebar-visible');
      body.classList.add("sidebar-" + sidebar);
    </script>

    <nav id="sidebar" class="sidebar" aria-label="Table of contents">
      <div class="sidebar-scrollbox">
        {{#toc}}{{/toc}}
      </div>
      <div id="sidebar-resize-handle" class="sidebar-resize-handle">
        <div class="sidebar-resize-indicator"></div>
      </div>
    </nav>

    <!-- Track and set sidebar scroll position -->
    <script>
      var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
      sidebarScrollbox.addEventListener('click', function (e) {
        if (e.target.tagName === 'A') {
          sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
        }
      }, { passive: true });
      var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
      sessionStorage.removeItem('sidebar-scroll');
      if (sidebarScrollTop) {
        // preserve sidebar scroll position when navigating via links within sidebar
        sidebarScrollbox.scrollTop = sidebarScrollTop;
      } else {
        // scroll sidebar to current active section when navigating via "next/previous chapter" buttons
        var activeSection = document.querySelector('#sidebar .active');
        if (activeSection) {
          activeSection.scrollIntoView({ block: 'center' });
        }
      }
    </script>

    <div id="page-wrapper" class="page-wrapper">

      <div class="page">
        {{> header}}
        <div id="menu-bar-hover-placeholder"></div>
        <div id="menu-bar" class="menu-bar sticky">
          <div class="left-buttons">
            <label id="sidebar-toggle" class="icon-button" for="sidebar-toggle-anchor" title="目录表"
              aria-label="Toggle Table of Contents" aria-controls="sidebar">
              <i class="fa fa-bars"></i>
            </label>
            <button id="theme-toggle" class="icon-button" type="button" title="更改主题" aria-label="Change theme"
              aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
              <i class="fa fa-paint-brush"></i>
            </button>
            <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
              <li role="none"><button role="menuitem" class="theme" id="light">亮</button></li>
              <li role="none"><button role="menuitem" class="theme" id="rust">锈</button></li>
              <li role="none"><button role="menuitem" class="theme" id="coal">碳</button></li>
              <li role="none"><button role="menuitem" class="theme" id="navy">海魂</button></li>
              <li role="none"><button role="menuitem" class="theme" id="ayu">阿黑</button></li>
            </ul>
            <script src="//lib.baomitu.com/translate.js/3.7.2/translate.js"></script>
            <button id="translate" class="icon-button" type="button" title="更改语言" aria-label="Change language"
              aria-haspopup="true" aria-expanded="false">
              <i class="fa fa-language"></i>
            </button>
            {{#if search_enabled}}
            <button id="search-toggle" class="icon-button" type="button" title="搜索 [S]" aria-label="Toggle Searchbar"
              aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
              <i class="fa fa-search"></i>
            </button>
            {{/if}}
          </div>

          <h1 class="menu-title">{{ book_title }}</h1>

          <div class="right-buttons">
            <a href="../{{ path_to_root }}" class="pjax-reload" title="返回主页">
              <i class="fa fa-home"></i>
            </a>
            {{#if print_enable}}
            <a href="{{ path_to_root }}print.html" onclick="window.location.href='{{ path_to_root }}print.html'"
              title="打印本书" aria-label="Print this book">
              <i id="print-button" class="fa fa-print"></i>
            </a>
            {{/if}}
            {{#if git_repository_url}}
            <a href="{{git_repository_url}}" title="Git 仓库" aria-label="Git repository">
              <i id="git-repository-button" class="fa {{git_repository_icon}}"></i>
            </a>
            {{/if}}
            {{#if git_repository_edit_url}}
            <a href="{{git_repository_edit_url}}" class="pjax-reload" title="本页源码" aria-label="Suggest an edit">
              <i id="git-edit-button" class="fa fa-edit"></i>
            </a>
            {{/if}}

          </div>
        </div>

        {{#if search_enabled}}
        <div id="search-wrapper" class="hidden">
          <form id="searchbar-outer" class="searchbar-outer">
            <input type="search" id="searchbar" name="searchbar" placeholder="在本站搜索："
              aria-controls="searchresults-outer" aria-describedby="searchresults-header">
          </form>
          <div id="searchresults-outer" class="searchresults-outer hidden">
            <div id="searchresults-header" class="searchresults-header"></div>
            <ul id="searchresults">
            </ul>
          </div>
        </div>
        {{/if}}

        <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
        <script>
          document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
          document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
          Array.from(document.querySelectorAll('#sidebar a')).forEach(function (link) {
            link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
          });
        </script>

        <div id="content" class="content">
          <main>
            {{{ content }}}
          </main>

          <nav class="nav-wrapper" aria-label="Page navigation">
            <!-- Mobile navigation buttons -->
            {{#previous}}
            <a rel="prev" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters previous" title="上一章"
              aria-label="Previous chapter" aria-keyshortcuts="Left">
              <i class="fa fa-angle-left"></i>
            </a>
            {{/previous}}

            {{#next}}
            <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters next" title="下一章"
              aria-label="Next chapter" aria-keyshortcuts="Right">
              <i class="fa fa-angle-right"></i>
            </a>
            {{/next}}

            <div style="clear: both"></div>
          </nav>
          <main>
            <hr>
            <div id="giscus-container"></div><!-- 新增 giscus 元素 -->
          </main>
        </div>
      </div>

      <nav class="nav-wide-wrapper" aria-label="Page navigation">
        {{#previous}}
        <a rel="prev" href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter"
          aria-label="Previous chapter" aria-keyshortcuts="Left">
          <i class="fa fa-angle-left"></i>
        </a>
        {{/previous}}

        {{#next}}
        <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter"
          aria-label="Next chapter" aria-keyshortcuts="Right">
          <i class="fa fa-angle-right"></i>
        </a>
        {{/next}}
      </nav>

    </div>

    {{#if live_reload_endpoint}}
    <!-- Livereload script (if served using the cli tool) -->
    <script>
      const wsProtocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
      const wsAddress = wsProtocol + "//" + location.host + "/" + "{{{live_reload_endpoint}}}";
      const socket = new WebSocket(wsAddress);
      socket.onmessage = function (event) {
        if (event.data === "reload") {
          socket.close();
          location.reload();
        }
      };

      window.onbeforeunload = function () {
        socket.close();
      }
    </script>
    {{/if}}

    {{#if google_analytics}}
    <!-- Google Analytics Tag -->
    <script>
      var localAddrs = ["localhost", "127.0.0.1", ""];

      // make sure we don't activate google analytics if the developer is
      // inspecting the book locally...
      if (localAddrs.indexOf(document.location.hostname) === -1) {
        (function (i, s, o, g, r, a, m) {
          i['GoogleAnalyticsObject'] = r; i[r] = i[r] || function () {
            (i[r].q = i[r].q || []).push(arguments)
          }, i[r].l = 1 * new Date(); a = s.createElement(o),
            m = s.getElementsByTagName(o)[0]; a.async = 1; a.src = g; m.parentNode.insertBefore(a, m)
        })(window, document, 'script', 'https://www.google-analytics.com/analytics.js', 'ga');

        ga('create', '{{google_analytics}}', 'auto');
        ga('send', 'pageview');
      }
    </script>
    {{/if}}

    {{#if playground_line_numbers}}
    <script>
      window.playground_line_numbers = true;
    </script>
    {{/if}}

    {{#if playground_copyable}}
    <script>
      window.playground_copyable = true;
    </script>
    {{/if}}

    {{#if playground_js}}
    <script src="{{ path_to_root }}ace.js"></script>
    <script src="{{ path_to_root }}editor.js"></script>
    <script src="{{ path_to_root }}mode-rust.js"></script>
    <script src="{{ path_to_root }}theme-dawn.js"></script>
    <script src="{{ path_to_root }}theme-tomorrow_night.js"></script>
    {{/if}}

    {{#if search_js}}
    <script src="{{ path_to_root }}elasticlunr.min.js"></script>
    <script src="{{ path_to_root }}mark.min.js"></script>
    <script data-pjax src="{{ path_to_root }}searcher.js"></script>
    {{/if}}

    <script src="{{ path_to_root }}clipboard.min.js"></script>
    <script src="{{ path_to_root }}highlight.js"></script>
    <script data-pjax src="{{ path_to_root }}book.js"></script>

    <!-- Custom JS scripts -->
    <script src="//lib.baomitu.com/pjax/0.2.8/pjax.min.js" type="text/javascript"></script>
    {{#each additional_js}}
    <script src="{{ ../path_to_root }}{{this}}"></script>
    {{/each}}

    {{#if is_print}}
    {{#if mathjax_support}}
    <script>
      window.addEventListener('load', function () {
        MathJax.Hub.Register.StartupHook('End', function () {
          window.setTimeout(window.print, 100);
        });
      });
    </script>
    {{else}}
    <script>
      window.addEventListener('load', function () {
        window.setTimeout(window.print, 100);
      });
    </script>
    {{/if}}
    {{/if}}
    <script src="//lf6-cdn-tos.bytecdntp.com/cdn/expire-1-y/instant.page/5.1.0/instantpage.min.js"
      type="text/javascript"></script>

  </div>
  <div class="loading-bar">
    <div class="progress"></div>
  </div>
</body>

</html>